{"id":5467,"date":"2026-09-20T09:39:38","date_gmt":"2026-09-20T01:39:38","guid":{"rendered":"https:\/\/www.solidess.com\/?p=5467"},"modified":"2026-09-20T09:39:38","modified_gmt":"2026-09-20T01:39:38","slug":"battery-energy-storage-system-malaysia-261kwh-bess","status":"publish","type":"post","link":"https:\/\/www.solidess.com\/fr\/battery-energy-storage-system-malaysia-261kwh-bess\/","title":{"rendered":"Battery Energy Storage System Malaysia: Size 261 kWh for a 90 kW TNB Peak"},"content":{"rendered":"
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"MegSolid\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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In Malaysia, an 80\u2013100 kW billed peak lasting about two hours makes both discharge power and delivered energy relevant to the cabinet choice. MegSolid Energon 261<\/a><\/strong> supplies 125 kVA and 261.24 kWh in a 1.76 m\u00b2 footprint, placing it between one undersized 215.04 kWh unit<\/a><\/strong> and a two-cabinet overbuild defined during C&I BESS design<\/a><\/strong>.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Energon 261 Fits an 80\u2013100 kW Two-Hour Demand Block<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Delivering 90 kW for two hours requires 180 kWh AC before conversion losses and operating reserve enter the calculation. The usable-energy screen below rejects one ESSA0100B-0215 for this two-hour duty.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Le Energon 261.24 kWh system<\/a><\/strong> combines 125 kVA and 261.24 kWh in one IP54 cabinet. Energon provides 400\/480 V AC options, intelligent liquid cooling, AI early warning and battery temperature-difference control within \u00b15\u00b0C. The worked energy duty does not require a second cabinet.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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MegSolid option<\/th>Note publi\u00e9e<\/th>Result for a 90 kW, two-hour peak<\/th><\/tr><\/thead>
ESSA0100B-0215<\/td>100 kW \/ 215,04 kWh<\/td>Power is adequate; nominal energy leaves too little room for losses and protected SOC<\/td><\/tr>
Energon 261<\/td>125 kVA \/ 261,24 kWh<\/td>One cabinet covers the preliminary power and energy screen<\/td><\/tr>
2 \u00d7 ESSA0100B-0215<\/td>200 kW \/ 430.08 kWh<\/td>Adds 202.8 kWh above the later 227.3 kWh calculation and doubles cabinet-level integration<\/td><\/tr>
ESSC0500B-1075<\/td>500 kW \/ 1,0752 MWh<\/td>Reserved for a much larger plant or campus demand block<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Compare the Installed Cabinet Footprints<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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Energon measures 1,300 \u00d7 1,350 \u00d7 2,200 mm, giving a 1.76 m\u00b2 equipment footprint before service clearances. One ESSA0100B-0215 occupies about 3.80 m\u00b2 from its 2,450 \u00d7 1,550 mm base, while two occupy about 7.60 m\u00b2.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Choosing one Energon instead of two ESSA cabinets reduces cabinet footprint by approximately 76.9% and removes one parallel branch from the preliminary layout.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Shorter peaks, lower power factor or an energy requirement beyond one cabinet can change the product selection. TNB billing windows and site interval data establish those boundaries.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Check Whether TNB Bills the Peak the Battery Will Remove<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Maximum-demand savings begin with the tariff category, voltage level and time of the recorded peak. TNB\u2019s current voltage-based tariff structure<\/a> classifies low voltage up to 1 kV, medium voltage above 1 kV and up to 50 kV, and high voltage above 50 kV and up to 230 kV. Use the tariff category on the site invoice when interpreting its meter data.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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The same 90 kW event can have a different billing effect under a Time-of-Use tariff. TNB states that maximum demand occurring during off-peak periods is not charged for non-domestic medium- and high-voltage ToU customers. The weekday peak window runs from 14:00 to 22:00. Other weekday hours and the entire weekend are off-peak.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Site tariff position<\/th>Peak that matters to the purchase<\/th>BESS operating result<\/th><\/tr><\/thead>
Non-domestic general tariff<\/td>Highest demand that reaches the billed maximum-demand line<\/td>Discharge against the recurring billed interval<\/td><\/tr>
Medium- or high-voltage ToU<\/td>Chargeable weekday event between 14:00 and 22:00<\/td>Hold sufficient SOC before 14:00 and cover the event<\/td><\/tr>
Peak occurs only during ToU off-peak hours<\/td>Event does not create the same maximum-demand charge<\/td>Avoid buying battery capacity for a saving the tariff does not create<\/td><\/tr>
Peak moves between production shifts<\/td>Different event may set the next bill<\/td>Control every qualifying event across the billing period<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Use Repeated 30-Minute Demand Blocks to Define the Duty<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Review at least 12 billing months of load data. Monthly kWh totals cannot show whether a 390 kW maximum came from one interval, four consecutive intervals or a repeated production cycle. An unchanged kW peak can require a different battery capacity when its duration increases.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Recorded event above a 300 kW target<\/th>Required BESS power<\/th>AC energy to remove the event<\/th>Orientation initiale de MegSolid<\/th><\/tr><\/thead>
One interval at 390 kW<\/td>90 kW<\/td>45 kWh<\/td>ESSA energy range<\/td><\/tr>
Four intervals at 390 kW<\/td>90 kW<\/td>180 kWh<\/td>Energon 261 energy range<\/td><\/tr>
Eight intervals at 340 kW<\/td>40 kW<\/td>160 kWh<\/td>Lower PCS power with a longer energy window<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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The highest interval sets the monthly maximum. The intervals around it establish how many kWh the battery needs. Repeated events also establish how often the cabinet must cycle and how much time remains for recharge. The PCC peak-shaving controller<\/a><\/strong> must prevent charging from creating a new billed maximum after the original peak has been reduced.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Set the PCS Requirement from kW and Power Factor<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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The meter establishes the required kW reduction. Power factor then converts that duty into the apparent power seen by the PCS and switchboard. The calculation for a plant reducing its billed peak from 390 kW to 300 kW is:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Required active-power reduction = 390 kW \u2212 300 kW = 90 kW
Required apparent power at PF 0.90 = 90 kW \u00f7 0.90 = 100 kVA<\/code><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Energon\u2019s published 125 kVA rating leaves 25 kVA between the calculated duty and the cabinet rating at this operating point. Lower power factor consumes that margin quickly:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Site power factor<\/th>Apparent power required for 90 kW<\/th>Margin below 125 kVA<\/th><\/tr><\/thead>
0.95<\/td>94.7 kVA<\/td>30.3 kVA<\/td><\/tr>
0.90<\/td>100.0 kVA<\/td>25.0 kVA<\/td><\/tr>
0.80<\/td>112.5 kVA<\/td>12.5 kVA<\/td><\/tr>
0.75<\/td>120.0 kVA<\/td>5.0 kVA<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Apparent power is the scope of this comparison. The 125 kVA nameplate states apparent power. Final commissioning must still confirm active power, reactive-power behaviour and harmonic performance at the site operating point through commercial BESS power-quality testing<\/a><\/strong>.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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CT direction can invalidate the dispatch calculation. Reversed CT polarity or a misplaced PCC measurement can command charging during a peak or discharging after the event has passed.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Le CT polarity commissioning test<\/a><\/strong> verifies that the controller sees import and export in the same direction as the revenue meter.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Size Battery Energy from Peak Duration and Protected SOC<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Power determines how far the demand falls; duration determines whether the cabinet can hold the target until the event ends. Four consecutive 30-minute intervals at a 90 kW reduction require 180 kWh at the AC connection:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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AC energy required = 90 kW \u00d7 2 hours = 180 kWh<\/code><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Energon\u2019s published maximum system efficiency is 90%. The worked case uses an 88% AC delivery factor and holds 10% of nominal energy outside the scheduled peak-shaving window. Required nameplate energy becomes:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Required nominal energy = 180 kWh \u00f7 0.88 \u00f7 0.90
= 227.3 kWh<\/code><\/p>\t\t\t\t<\/div>\n\t\t\t\t

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One ESSA0100B-0215 is 12.3 kWh below the 227.3 kWh screen. Energon is 34.0 kWh above it. Applying the same delivery factor and SOC window to both cabinets gives:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Produit<\/th>\u00c9nergie nominale<\/th>Energy after 10% SOC reserve and 88% delivery factor<\/th>Duration at 90 kW<\/th><\/tr><\/thead>
ESSA0100B-0215<\/td>215,04 kWh<\/td>170.3 kWh AC<\/td>1.89 hours<\/td><\/tr>
Energon 261<\/td>261,24 kWh<\/td>206.9 kWh AC<\/td>2.30 hours<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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With the stated reserve and delivery factors, Energon has approximately 26.9 kWh AC beyond the two-hour requirement. The extra energy covers a modest extension while keeping the defined SOC reserve.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Long-term sizing still needs the project degradation model and guaranteed-energy schedule. The test de capacit\u00e9 des syst\u00e8mes de stockage d'\u00e9nergie par batterie (BESS) \u00e0 usage commercial<\/a><\/strong> verifies delivered AC energy at the agreed power, SOC limits and ambient condition.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Shorter events favour the 215.04 kWh cabinet. Ninety minutes at 90 kW needs 135 kWh AC and 170.5 kWh of nameplate energy under the same factors, placing it inside the ESSA0100B-0215 range. Extending the measured event by only 30 minutes can move the purchase between the two products.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Match the Demand Block to ESSA, Energon or ESSC<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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MegSolid\u2019s ESSA, Energon and ESSC classes give Malaysian factories different power and energy blocks for measured demand. The 215.04 kWh ESSA suits shorter peaks, Energon fills the two-hour single-cabinet gap, and ESSC0500B-1075 moves the project into a 500 kW container architecture.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Droit mesur\u00e9<\/th>MegSolid selection<\/th>Published product advantage<\/th>Customer result<\/th><\/tr><\/thead>
Up to 100 kW with calculated nameplate energy at or below 215.04 kWh<\/td>ESSA0100B-0215<\/a><\/strong><\/td>100 kW, 215.04 kWh, 400 V, built-in isolation transformer, on-grid THDi <3%<\/td>Avoids paying for the longer 261.24 kWh energy window<\/td><\/tr>
Approximately 80\u2013100 kW for close to two hours<\/td>Energon 261<\/a><\/strong><\/td>125 kVA, 261.24 kWh, 400\/480 V, liquid cooling, up to 10 units in parallel<\/td>Covers the worked duty with one compact cabinet and preserves an expansion path<\/td><\/tr>
Several hundred kilowatts with an energy requirement approaching 1 MWh<\/td>ESSC0500B-1075<\/a><\/strong><\/td>500 kW, 1.0752 MWh, IP54, 6,058 \u00d7 2,438 \u00d7 2,896 mm<\/td>Replaces a growing group of small cabinets with one container-level block<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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When the Container-Class Screen Applies<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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ESSC0500B-1075 enters the comparison when both required power and energy approach its class. Sustaining a 350 kW reduction for two hours requires 700 kWh AC. Using the same 88% delivery factor and 10% SOC reserve gives 883.8 kWh of required nameplate energy, which sits inside the 1.0752 MWh ESSC0500B-1075 rating.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Its 21,000 kg weight and container dimensions then become transformer, switchboard, foundation and delivery-route decisions.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Energon remains the strongest match for the 90 kW factory because ESSC would provide 410 kW more rated power and 814.0 kWh more nominal energy than the selected cabinet. Those unused ratings add infrastructure without improving the two-hour demand target.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tReceive a 215 kWh vs 261 kWh Duty-Matched Sizing Comparison<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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Keep Energon Ready for the Chargeable TNB Window<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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The two-hour event can be controlled only if the required energy remains available when the chargeable window begins. Under the current TNB ToU schedule, a medium- or high-voltage factory can prepare the battery before 14:00, protect the required SOC through the weekday peak window and recharge after 22:00. Weekend operation can use the all-day off-peak period when production permits.<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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Control priority for the 90 kW site should follow this order:<\/p>\t\t\t\t<\/div>\n\t\t\t\t

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